Software upgrades come out on a pretty regular basis, but they're not always worth the upgrade. Sometimes, updates even manage to make the software worse, or they never come at all. So, we want to know: what's the oldest software you're still using?

Whether it's a bad update that ruins your favorite functionality, or you simply can't afford to drop a couple hundred dollars on an upgrade every year, software updates are one of those things many of us ignore. Of course, often enough, your favorite piece of software just doesn't get updated at all, which means that within a few years you might be running it in a virtualized environment just to get it working. So, let's hear it: what's the oldest software you're still using?